Workplace Safety Screenings (WSS) is a CTPA (Consortium/third-party administrator) headquartered in Houston, Texas. The women-owned business provides customize workplace-related health services including 24/7 screenings, occupational health and compliance consultations.

Workplace Safety Screenings enhances safety, mitigates liability, and streamlines health and safety needs for their clients. 

We protect our clients' people, their reputation, and their bottom line. We are the leading advocate for a drug free workplace, background screenings and occupational health. The sun never sets on our services – our professional team is available to clients 24/7.

OUR VISION: The best companies in North America look to us to safeguard their businesses and people. Shielded by our innovative and rigorous screening solutions, our clients thrive. Every workplace is a sanctuary of safety, where success and well-being go hand in hand.


WSS means safety, simplified.

Whole-system safety doesn't need to be complicated. All of WSS's services include access to the SHIELD PORTAL, a 24/7 online portal providing quick access to an up-to-date directory of all employee records. Our consolidated one-invoice system makes it easy to navigate multiple contacts and service suppliers, meaning you'll never be overcharged or miss a payment.

Connect with a WSS agent now to learn how we can help you create a customized safety program from our comprehensive roster of safety, screening and compliance services.




Tona Trondsen has over 15 of experience in occupational health management, workplace safety and maritime support services. Born in Norway to a ship captain and raised in Houston, Trondsen’s unique insight into the unique needs of seafarers has helped her to develop a community-oriented business that remains responsive to the needs of its partners, exemplified in WSS’ early implementation of the International Seafarer Vaccination Program to administer more than 25,000 vaccinations for seafarers passing through the US Gulf Area

She is also the founder and CEO of Port Health, a comprehensive, full-service medical support solution helping international seafarers access health services on board and in port, ensuring crews stay on budget and on schedule any time or day of the year. 


Workplace Safety Screenings team of health professionals, compliance officers and in-house recovery coaches are equipped to provide full roster of efficient, effective and reliable services: 

  • Drug & Alcohol Testing
  • Urine Drug Testing (UDT)

  • Breath Alcohol Testing (BAT)

  • Saliva Drug Testing

  • Hair Follicle Testing

  • Blood Testing

  • Random Testing

  • Post-Accident Testing

  • Pre-Employment Testing

  • Drug and Alcohol Education Programs
  • On-Site Testing
  • Urine Test Strips or Cups

  • Saliva Tests

  • Multiple Drug Panels

  • Immunoassay Devices
  • Chain of Custody Forms

  • pH Strips and Specific Gravity Tests

  • Control Samples
  • Occupational Health
  • Pre-Employment Health Screening

  • Health Risk Assessments

  • Workplace Hazard Assessment

  • Health Surveillance

  • Immunizations and Vaccinations

  • Ergonomics Assessments

  • First Aid and Emergency Response

  • Health Records and Confidentiality

  • Regulatory Compliance

  • Return-to-Work Programs

  • Fit For Duty

  • Wellness Fairs including Biometric Testing

  • Body Fat & Cardio Analysis

  • Pulmonary Function Test (PFT), Quantitive Fit Testing (QNFT)
  • Background Screening
  • Criminal History Check

  • Employment Verification

  • Education Verification

  • Credit History Check

  • Reference Checks

  • Driving Record Check

  • Social Media Screening

  • Drug Testing

  • Professional License Verification

  • Global Watchlist Check

  • Civil Records Check

  • Social Security Number Trace
  • Compliance Management
  • DOT Compliance

  • Standard Driver Qualification

  • Application
    DOT Drug Free Workplace Policy

  • DOT FMCSA Clearinghouse

  • Driver History
    DOT Physicals

  • Pre-Employment and all other forms of
    drug testing

  • Random Testing Pool or Consortium

  • Membership

  • Follow-up Testing


It's time to invest in safety.

We are your trusted partner in 24/7 safety support.

Call today to schedule your free consultation